Effect of Dietary Carbohydrate Content and Inulin-Fructooligosaccharide Supplementation on Glycemic Control in Individuals With Type 1 Diabetes Mellitus

June 23, 2026 updated by: Mevlude Kizil, Hacettepe University

Effect of Dietary Carbohydrate Content and Inulin-Fructooligosaccharide (FOS) Supplementation on Glycemic Control in Individuals With Type 1 Diabetes Mellitus

Diabetes is a chronic metabolic disease in which nutrients such as carbohydrates, fats and proteins cannot be utilized sufficiently due to the inability to produce insulin or defects in the effect of the produced insulin. The risk of individuals encountering complications related to diabetes decreases when glycemic control is achieved in these patients. Therefore, nutrition is an necessary component of treatment. Although there are many studies in the literature examining the effect of carbohydrate intake on glycemic control in individuals with diabetes and monitoring carbohydrate intake in individuals with diabetes is the basic strategy for reaching glucose targets, a common denominator has not yet been reached for the optimal amount of carbohydrate intake for individuals with diabetes. There are a wide range of definitions regarding carbohydrate intake and studies on carbohydrate restriction, especially in individuals with Type 1 diabetes, are limited.

In present randomized controlled crossover study, three isocaloric different dietary treatment are planned to applied for 2 weeks in which (i) 30% of the daily energy requirement is provided from carbohydrates, not to fall below 130 g/day carbohydrates according to the individual characteristics of the patients, (ii) 50-55% of the daily energy requirement is provided from carbohydrates and (iii) carbohydrate content in the diet is adjusted without increasing the amount of carbohydrates, by supplementing 2 sachets (1 sachet 3.68 g inulin + 3.68 g ) where 50-55% of daily energy requirement is provided from carbohydrates together with fructooligosaccharide (FOS)) inulin fructooligosaccharide (FOS) supplementation. A 2-week washout period is planned between each diet model. The research will be conducted with 20 individuals with Type 1 diabetes using a Continuous Glucose Monitoring device. The proposed project aims to investigate the effect of different dietary treatments on glycemic control in individuals with Type 1 diabetes by using a continuous glucose measuring device. At the end of each dietary treatment application, the data obtained from the Continuous Glucose Measuring Device will be evaluated as the primary outcomes; total insulin dose, insulin/Carbohydrate ratio, total bolus insulin dose will be evaluated as the secondary outcomes. As a result of the research, the potential effects of different dietary treatments on glycemic control will be evaluated and the development of the most appropriate diet model for these patients will be contributed. In addition, this research will contribute to the improvement of the continuous glucose monitoring device.

Study Overview

Status

Active, not recruiting

Conditions

Intervention / Treatment

Study Type

Interventional

Enrollment (Estimated)

30

Phase

  • Not Applicable

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Description

Inclusion Criteria:

Patients aged 18-65 years diagnosed with Type 1 diabetes and currently using a Continuous Glucose Monitoring device

Exclusion Criteria:

  • Individuals with type 2 diabetes
  • Individuals with gestational diabetes
  • Breastfeeding individuals
  • Individuals with celiac disease
  • Individuals with gastroparesis
  • Renal insufficiency (tGFR ≤ 60 ml/min/1.73 m2)
  • Diagnosed liver failure
  • Immunodeficiency
  • Individuals with malignancy
  • Using nutritional supplements that may affect metabolic parameters

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Screening
  • Allocation: Randomized
  • Interventional Model: Crossover Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: 30% of the daily energy requirement is provided from carbohydrates, not to fall below 130 g/day carb
Other: Dietary carbohydrate 30%
Dietary carbohydrate is 30% of daily energy requirements
Experimental: 50-55% of the daily energy requirement is provided from carbohydrates
Other: Dietary carbohydrate 50-55%
Dietary carbohydrate is 50-55% of daily energy requirements
Experimental: carbohydrate content in the diet is adjusted without increasing the amount of carbohydrates, by supp
Dietary supplement: fructooligosaccharide and inulin
Carbohydrate content of diet

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Time Frame
Continuous Glucose Measuring Device Measurements
Time Frame: From the enrollment to the end of treatment at 8 weeks
From the enrollment to the end of treatment at 8 weeks

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Other measurements
Time Frame: From the enrollment to the end of the treatment at 12 weeks
total insulin dose, insulin/Carbohydrate ratio, total bolus insulin dose
From the enrollment to the end of the treatment at 12 weeks

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Hacettepe University

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

May 11, 2026

Primary Completion (Estimated)

July 20, 2026

Study Completion (Estimated)

July 27, 2026

Study Registration Dates

First Submitted

June 23, 2026

First Submitted That Met QC Criteria

June 23, 2026

First Posted (Actual)

June 29, 2026

Study Record Updates

Last Update Posted (Actual)

June 29, 2026

Last Update Submitted That Met QC Criteria

June 23, 2026

Last Verified

May 1, 2026

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • KA-24037

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

UNDECIDED

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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